Simplified inelastic analysis procedure to evaluate a butt-welded elbow end

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In a thin-walled piping network, the end of an elbow welded to a straignt pipe constitutes one of the highly stressed cross-sections that require structural evaluation. Explicit rules are not provided in the ASME Code for structural evaluation of the elbow ovalization and fabrication effects at the welded end. This paper presents a conservative semi-analytical procedure that can be used with simplified inelastic analysis to evaluate the elbow cross section welded to the straight pipe. The concept of carry-over factors is used to obtain ovalization stresses or strains at the elbow end. The stresses introduced by material and geometric nonuniformities ... continued below

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Pages: 20

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Dhalla, A.K. January 1, 1981.

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Description

In a thin-walled piping network, the end of an elbow welded to a straignt pipe constitutes one of the highly stressed cross-sections that require structural evaluation. Explicit rules are not provided in the ASME Code for structural evaluation of the elbow ovalization and fabrication effects at the welded end. This paper presents a conservative semi-analytical procedure that can be used with simplified inelastic analysis to evaluate the elbow cross section welded to the straight pipe. The concept of carry-over factors is used to obtain ovalization stresses or strains at the elbow end. The stresses introduced by material and geometric nonuniformities in the fabrication process are then added to the ovalization stresses to complete structural evluation of the girth butt-welded elbow joint.

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Pages: 20

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NTIS, PC A02/MF A01.

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  • ASME PVP conference, Denver, CO, USA, 21 Jun 1981

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  • Report No.: CONF-810625-16
  • Grant Number: AC15-76CL02395
  • Office of Scientific & Technical Information Report Number: 6513565
  • Archival Resource Key: ark:/67531/metadc1209951

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1981

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Oct. 26, 2018, 1:09 p.m.

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Dhalla, A.K. Simplified inelastic analysis procedure to evaluate a butt-welded elbow end, article, January 1, 1981; United States. (digital.library.unt.edu/ark:/67531/metadc1209951/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.